Hey everyone! I have an engineer goby/convict blenny and it has tunneled in the sand under my tank. We have a really bad sand algae problem like this brown algae over our sand bed, and my teacher recommended getting a sand shifter creature, but I'm worried the tunnels would collapse on my fish. Any advice/personal experience? Would the tunnels even collapse/would the fish die if the tunnels collapse, or would he/she be able to dig out? Thanks!